Going out

Visitor's Question from a 16-20 year old FemaleFirst of all, I've always been friends with guys, but nothing more. I've never dated anyone. In one of my classes I saw this really cute guy. So I asked him for help and we started talking, and he would walk with me after class, wait for me after exams, go to lunch with me, talk online, etc. Eventually he came to a party of one of our mutual friends. We all became really good friends and would hang out all the time. Whenever we all went places and did stuff he would specifically ask if I was going.

Now that you know the backstory: I go home every weekend, and one weekend they had a party, got drunk and he hooked up with one of my friends. After this, she became very attached and would hang all over him. He seemed indifferent and would come over and talk with me, leaving her. Now over the summer, he got a job at the same placed I work. We always try to meet up for breaks, and work parties. I just want to know if I should go forward with persuing a relationship.